Filter for sediment traps



1948- R. F. CORWIN FILTER FOR SEDIMEN'I' TRAPS Filed Oct. 20. 1947Inventor Richard F Corwin Patented Nov. 16, 1948 FILTER son SEDHWEN'ITRAPS Richard F. Corwin, East Hampton, N. Y., assignor to R. A. Corwin &Son, East Hampton, N. Y.

Application October 20, 1947, Serial No. 780,959

2 Claims.

This invention relates to a filter for a sediment trap of the typedisclosed in United States Patent 1,040,283, issued October 8, 1912, toE. L. Crum.

Applicant is aware of numerous prior patents pertaining to filters forsediments traps as evidenced by Patent No. 1,630,287, issued May 31,1927, to S. S. Amdursky; 907,636, issued December 22, 1908, to G. W.Mutz; Patent No. 1,932,676, issued October 31, 1933, to E. A. Rockwell;and Patent No. 1,175,948, issued March 21, 1916, to C. L. French,

While the art so far developed discloses various types and kinds offilters for use in sediment traps, each trap of which applicant is awarerequires the use of tools and the like when it becomes necessary ordesirable to remove a filter for cleaning or replacement.

The primary object of the present invention is to facilitate the rapidremoval and replacement of a filter, should it become necessary tocleanse the filter or introduce a substitute filter in place of one thatmay have become clogged or otherwise defective. H

Another obj ect is to enable filters of different porosities to beintroduced into the sediment trap of a fuel line, and thus provideselectivity as to the porosity of the filter finally employed, inaccordance with the character of fuel passing through the line.

The above and other objects may be attained by employing this inventionwhich embodies among its features an externally screw threaded headhaving an axial discharge opening, a bushing extending through thedischarge opening for removably supporting the head in concentricrelaticn to and in communication with the discharge passage of asediment trap, an externally knurled internally threaded retaining ringremovably threaded on the head and a filter unit supported by theretaining ring in a position to cover the discharge opening in the head.

In the drawings:

Figure 1 is a side view partially in section of a sediment trap equippedwith this improved filter,

Figure 2 is a vertical sectional view taken substantially along the line2-2 of Figure l, and

Figure 3 is a horizontal sectional view taken substantially along theline 33 of Figure 1.

Referring to the drawings in detail a conventional sediment trapdesignated generally I is provided with a head i l having an axialdischarge passage i2 and an eccentrically located inlet passage it. Thehead H is also provided with an annular shoulder i l against which agasket I5 of any suitable material is seated. Pivotally supported on thehead II as at l6 are the free ends of the legs of a U-shaped yoke H, thebight portion of which has threaded therethrough the threaded shank 18of a clamp screw designated generally 59, the head 20 of which isperipherally knurled in a conventional manner. A conventional sedimentcollecting bowl 2! has its open end seated against the gasket 15, and isheld in this position by the clamp screw l9 above referred. The sedimenttrap above described is of conventional form and in ordinary use thedischarge passage i2 thereof is equipped with a filter which serves toprevent solid matter from entering the discharge passage.

As illustrated in Figure 2 the end of the discharge passage which opensinto the bowl 2| is internally screw threaded as at 22, and in thepreferred form of my invention a bushing 23 having external screwthreads at one end is threadedly entered into the threaded opening 22.The end of the bushing opposite its threaded end is provided with anannular outwardly extending flange 2 3, the perimeter of which ispreferably polygonal to enable the bushing to be turned bya wrench orthe like. Clamped between the head ll of the sediment trap and theflange 24 of the bushing '23 is an externally screw threaded head 25 ofmy improved filter designated generally 26. As illustrated the head 25is provided with a depending peripheral flange 21, and threaded on thehead 25 is a retaining ring 28 provided at one end with an inwardlyextending annular supporting flange 29 by means of which my improvedfilter unit designated generally 30 is supported within the bowl 2'! andacross the discharge passage l2 in the head ll of the sediment trap 10.The periphery of the retaining ring 28 is knurled to facilitate itsrotation about the head 25 and enable a filter unit 30 easily andquickly to be placed in position in the head or removed therefrom asoccasion demands.

The filter unit above referred to comprises a cylindrical body 3| offoraminous material such as screen wire, and one end of the body 3! isclosed by a foraminous bottom 32 of like material. Extending outwardlyfrom the opposite end of the body 3| is an annular supporting flange 33,and filling the body is a filtering substance 34 which in its preferredform comprises finely divided steel wool or like inorganic fibroussubstance. Overlying the filtering material 34 at the end of thecylindrical body 3| remote from the bottom 32 is a layer of filter cloth35 which is preferably woven from glass fibers or like inorganic ormetallic substance. A foraminous disk 36 of the material from which thecylindrical body 3| is formed overlies the layer 35 of filter cloth, andwhen the filter unit 3|] is in place in the filter this disk 36 liesacross the filter unit in spaced relation to the lower end of thebushing 23, to form a chamber 31 which serves as a reservoir for thefiltered liquid.

In the preferred form of the invention a gasket 38 is interposed betweenthe upperside of the head 25and the underside of the head I I in orderto form a fluid tight junction between these parts.

In the installation of this improved filter in a conventional sedimenttrap, the screw 19 is turned to release the pressure on the bowl 2| andwithdrawn far enough to permit the yoke I! to swing about its pivot [6so that the bowl 2i may be removed from the head ll. Should the passagel2 be smooth, it is tapped to provide the threads 22 and the bushing 23with the head 25 resting on the flange 24 is then introduced into thedischarge passage l2, and by applying a wrench to the polygonalperimeter of the flange 24 it is evident that a tight junction may beefi'ected between the heads H and 25. It is of course preferable thatthe gasket 38 be employed to prevent the escape of the liquid beingfiltered into the discharge passage I2 before it passes through thefilter. A suitable filter unit is then fitted into the retaining ring 28with the flange 33 thereof resting on the flange 29 and upon engagingthe threads of the ring 28 with the threads of the head 25 and rotatingthe ring it is evident that the filter unit 30 may easily and quickly beplaced in filtering relation with the discharge passage l2 of thesediment trap. Owing to the fact that the ring 28 is externally knurledit is evident that no tools of any kind will be required to rotate thering about the head 25. After the filter has been placed in position aspreviously described the bowl 2| is replaced on the head H and the yokeI1 is again swung into position so that its bight portion lies beneaththe bottom of the bowl whereupon the rotation of the screw l9 may causeit to impinge against the bottom of the bowl and clamp the latter firmlyin place on the head I l. The device is then ready for use and it willbe evident that liquid flowing into the trap through the passage ['3will descend into the bowl 2| and thence fiow upwardly through thefilter unit 30 into the discharge passage l2, so that any sediment orforeign matter carried by the fuel into the trap will be deposited inthe bowl, and the filter will prevent its discharge through thedischarge passage l2.

While in the foregoing there has been shown and described the preferredembodiment of this invention it is to be understood that minor changesin the details of construction, combination and arrangement of parts maybe resorted to without departing from the spirit and scope of theinvention as claimed.

Having described the invention, what is claimed as new is:

1. A filter for a sediment trap comprising an externally screw threadedhead having an axial discharge opening, a bushing extending through thedischarge opening for removably supporting the head in concentricrelation to and in communication with the discharge passage of asediment trap, an externally knurled internally threaded retaining ringremovably threaded on the head, an inturned annular supporting flange onthe ring, a filter unit adapted to cover the discharge opening in thehead and an outwardly extending annular flange on the filter unit forcooperation with the inturned supporting flange on the ring in holdingthe filter unit in proper position on the head.

2. A filter for a sediment trap comprising an externally screw threadedhead having an axial discharge opening, a bushing extending through thedischarge opening for removably supporting the head in concentricrelation to and in communication with the discharge passage of asediment trap, an externally knurled internally threaded retaining ringremovably threaded on the head, an inturned annular supporting flange onthe ring and a removable filter unit held by the flange in filteringrelation to the discharge passage in the head.

RICHARD F. C'ORWIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 907,636 Nutz Dec. 22, 19081,040,283 Crum Oct. 8, 1912 1,071,306 Finigan Aug. 26, 1913 2,083,546Aldham June 15, 1937 2,104,519 Hum Jan. 4, 1938 OTHER REFERENCESChemical and Metallurgical Engineering, vol. 25, No. 20, November 16,1921, page 919, Figure 12.

